Hair roller ball



FIG. 1 is a front elevational view showing my new design for a hair roller ball, the rear view appearing the same; and wherein each of the lines shown represents a row of fastening filaments such as those shown on the periphery of the FIGURE; and,

FIG. 2 is a top plan view thereof, the bottom plan view appearing the same. 

The ornamental design for a hair roller ball, as shown and described. 